There is a Papa Johns in the shopping center right there but they don't open until 11am. Might be the same with other usual lunch places.
It's unlikely downtown SS places will deliver, IMO. I live just outside the Beltway and they don't deliver to me.
Wheaton Mall is relatively close and they opened a Panera there so they might deliver.
You can also check out the restaurants in Wheaton here:
http://www.wheatonmd.org/dining/restaurants.